I not sure if it's the same brake set up but if it's a e-brake built into the caliper, on my Saturn aura 2007 I had to put the c clamp on the bolt on back of caliper and it directly on the caliper and it rotated back into housing as it pushed. I tried it with the brake pad between it and the caliper much like you typically do and it would not budge. Do it without and it will rotate back in worked like a dream for me.